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Elastic

Description

The Elastic section is a model of linear-elastic section response for axial and flexural elements like beams, columns, walls, and trusses. The Elastic section can be defined for 2D or 3D models and can include shear flexibility.

Syntax

For 2D models:

ops.section('Elastic',tag,E,A,I)
ops.section('Elastic',tag,E,A,I,G,alpha)

For 3D models:

ops.section('Elastic',tag,E,A,Iz,Iy,G,J)
ops.section('Elastic',tag,E,A,Iz,Iy,G,J,alphay,alphaz)

Parameters

• tag : integer Unique section identifer
• E : float Elastic modulus
• A : float Cross-section area
• I : float Second moment of cross-section area (for 2D models)
• Iz : float Second moment of cross-section area about z-axis (for 3D models)
• Iy : float Second moment of cross-section area about y-axis (for 3D models)
• G : float Shear modulus (required for 3D models)
• J : float Second polar moment of cross-section area (for 3D models)

Optional Parameters

• G : float Shear modulus (optional for 2D models)
• alpha : float Section shape factor for shear (for 2D models)
• alphay : float Section shape factor for shear along y-axis (for 3D models)
• alphaz : float Section shape factor for shear along z-axis (for 3D models)

Notes

None

Examples

# Modulus = 29000, area = 20, I = 800
ops.section('Elastic',1,29000,20,800)

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